Do not trust the AOL AIM software-- it's only recommended for up to Palm V, and was never tested by AOL on any Treos.

It totally trashed my Treo -- three times -- by corrupting system databases, which put it into a reset loop. I had to wipe it and reinstall each time. But I could never figure out what was causing the problem, until this last time.

It's possible there's a conflict between it and some other program I run (TomTom Navigator?) but there are many better free AIM programs out there.